Spring.



No. 806,236. PATENTED DEC. 5, 1905.

J. H. BROWN.

SPRING. APPLICATION FILED DEO.19, 1904.

WEE/ 6065. Iwezzfaz Jamea ficffrowm UNITED STATES PATENT OFFICE.

JAMES H. BROWN, OF ST. CHARLES, ILLINOIS, ASSIGNOR OF ONE-HALF TO FRED E. GLENN OF ST. CHARLES, ILLINOIS.

SPRING- Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed December 19, 1904. Serial No. 237,552.

To all whom it may concern:

Be it known that I, JAMES H. BROWN, a citizen of the United States, residing at St.

Charles, in the county of Kane and State of pecially Where one is to drive the otherfor example, a windmill-rod and the piston-rod of a pump driven thereby.

The objects of my invention are,first, to provide a spring which is light in weight, durable, simple in construction, and comparatively stiff in withstanding transverse strains, and,

--se'cond, to provide means for facilitating the attachmentand detachment of the spring to and from the piece to which it is to be connectedfor example, the piston-rod of a pump. I accomplish these objects by. the

' to the piston-rod of a pump. Fig. 2 is aperspective view showing the spring attached to the piston-rod of a pump. Fig. 3 is, an enxlarged fragmentary view taken in vertical section through the connecting-pin and shows ,thg manner of connecting the spring to the -ro Similar letters refer tosimilar parts throughout the several views.

This device is designed to transmit its greatest force under tension rather than under com,- .press1on, and for th sreason it 1s particularly adapted for use in connection with ordinary lift-pumps driven by means of windmills, for in such cases the greatest portion of the work To facilitrated in connection with a pump operated by a windmill; but the invention is not limited to this purpose, for it is applicable to any conditions where one machine element is to have yielding sprlng connection to another to be driven thereby.

Referring to the drawings, the side members a Z) are approximately bow-shaped and are adapted tobe bolted or otherwise connected at their upper extremity to the windmill-rod 0. At or near the lower extremity of the members a and b means is provided for their attachment to the bar d, which in the present instance constitutes the piston-rod of a pump. Under ordinary conditions the members a and 6 will consist simply of thin strips .of band-iron or similar comparatively cheap material, and in order that they may be reinforced at the point of attachment to the bar OZ it is desirable that they be provided with blocks 6, which are secured to the inside of said side members and adapted to lie between said side members and the bar d.

The pin f passes through the member a and its block 6 and is threaded so as to screw into the member a, as best shown in Fig. 3. By screwing the lock-nut f on the pin 6 against the outer side, of themember a said pin is At a point corresponding to the location of pin f the member 6 and block a thereon are apertured to receive the opposite extremity of said pin, and said pin has a groove f for receiving the extremity of the keeper g. Keeper g is pivoted to the outside of member 6 in such position that its 1 lower extremity may be swung into the groove f to engage pin f, and thereby hold the parts in assembled position, as shown in Figs. 2 and-'3, or may rigidly and-Ypermanently secured to member abe swung free of pinfto release the same and permit the members a and b to spread in the manner shown in Fig. 1. The member cl is apertured to receive pin f, and when the parts are assembled and the pin fixed in position as shown in Fig. 3 the members a and b will be firmly attached to the bar 0?. I

The members a and bare not calculated t furnish much of the elasticity between the pieces 0 and d; but the elasticity is obtained by means of the cross-spring it, which is ap-- proximately bow or crescent shaped, as shown, and is so attached to, pieces a and I; as to form an arch or transverse conn ecting-plece between them. In'order to avoid any possible inter:

ference with the upper extremity of bar d, it is preferable that the spring h be arched upward, so that the bend'thereof shall lie above the point of attachment to members a and I).

the Washers are bent over the edges of the members a, b, and it, so as to hold spring h upright and prevent it from rotating about its rivets as an axis, and thus falling to where it might interfere with rod @Z when rod 0 is moving, but disconnected from rod d.

' Usually the side members a and b will remain permanently attached to rod 0, but when out of use will remain disconnected from rod cl, so that rod cZ may be temporarily operated by hand. When, however, it is desired to drive rod cl by means of rod 0, the members a and b are brought togetherat the bottom and the pin f is passed through the apertured rod d and through the member 6 and block 0 thereon. The keeper or latch g is then rotated so as to enter the groove f on pin 7, when the parts will be held in the condition shown in Fig. 2. The driving-rod c is then put in motion and in the present instance travels in a vertical direction. Little force will be required to lower rod (1, and on the downstroke the configuration of the spring device will not be greatly altered; but on the upstroke the rod 0? will offer its maximum resistance, and the resulting drag will tend to straighten out the side members ab and compress the cross-spring 71.. Inasmuch as spring 71 is elastic, it will tend to equalize the stroke of the parts, so that if the motion of the driving-rod 0 should be uneven, or it should change its direction of motion suddenly, the driven rod 61 will be relieved of any shock or jar. When rod 0 has finished its upward stroke and starts to return, the members a I) will first return to normal condition and then spread beyond normal condition; but an excessiv spread will be prevented by spring h.

With this form of spring the members a and 6 do not require to be made of spring material; but by reason of the relationship of the parts a small amount of spring metal will produce a high coefiicient of expansion with a maximum range of fiexure. Moreover, the spring 71, is arranged in such position as to give maximum elasticity with minimum Weight, so that the device need not be heavy in construction.

A peculiar advantage possessed by this device over the helical springs frequently employed for similar purposes is the lateral stiifness which it oifers and which enables it to remain in alinement during compression. This is a result of the fact that a transverse bending stress is resisted in one transverse direction by the combined width of both of the members a and b and in the rectangular transverse direction by the bow of said members, coupled with the fact that at their middle portions they are widely spread apart and are located on opposite sides of the center line of action. Another of the advantages of this device lies in the ease and facility with which the members a and b may be attached to the driven member (5, it being merely necessary to pass the pin through the parts (Z and rotate the pin through the parts (I and Z) and rotate the keeper 9 about its pivot. The pin remains always attached to the member a and cannot be lost or shaken loose.

hat I claim as new, and desire to secure by Letters Patent, is

1. A spring device for transmitting power from one reciprocating element to another, said spring device consisting of two resilient lateral members connected together at their ends and extending in the general direction of thedirection of reciprocation; and a strut cross-spring acting upon said lateral members between their extremities for yieldingly tending to force the same apart.

2. A spring device for transmitting motion from one machine element to another, said device consisting of two lateral members adapted to be attached to and connected by the two elements to be connected; in combination with a cross-spring extending from one of said lateral members to the other.

3. A power-transmitting spring device consisting of a spring extending transverse to the median line of elasticity of the device; a driving and a driven element adapted to move in the direction of the median line of elasticity of the device; and lateral members attached to said driving and driven elements and to said transverse spring.

4. In a spring device for transmitting motion from one member to another, the combination, with two reciprocating members, of two lateral spring members attached to said reciprocating members for transmitting motion from one to the other thereof; and a spring transverse to the direction of motion of the device, and connecting said lateral spring members at a point between their ends.

5. In combination,a driving and ad riven element adapted to reciprocate in a straight line, oppositely-bowed resilient members connecting them, and a transverse spring attached to and connecting said resilient members at the bows therein.

6. A spring device consisting of two resilient lateral members and a strut cross-spring connecting them; in combination with means for detachably attaching said lateral members to an exterior mechanical element.

7. A spring device consisting of two lateral members and a cross-spring connecting them; in combination with a pin rigidly attached to one of the lateral members and extending toward the other of said lateral members, and a keeper upon the other of said lateral members for engaging said pin for the purpose described.

8. A spring device consisting of two flexible lateral members and a strut cross-spring connecting them; in combination with reinforcing-blocks at one extremity of said lateral members, said lateral members and the blocks thereon being apertured to receive an attaching-pin or similar object for attaching the spring device to an exterior mechanical element. I v

9. In combination, two mechanical elements designed to be elastically connected together;

- two metallic strips attached at opposite ends to said elements, said strips being bowed in opposite directions; and a cross-spring attached to said metallicstrips at the bowed portion thereof. a

10. In combination, a reciprocating driving and a reciprocating driven element and a spring device connecting-them for transmittingmotion fronfone to the other, said spring device consisting of two metal strips bowed between theirends andattached near their ends to said driving and drivenelements; and

JAMESH. BROWN. Witnesses: I l

FRED. E. GLE N,

A. C. AROKELIAN. 

